Anil Gunawardena

Dear Friends, I'm having Nissan Leaf 2013 X Grade Car. My Battery Cells Getting Reduce. Now I got 6 White Cells (Excluding Red Cell) I know, Lots of Nissan Owners having the same issue. Can we replace with higher capacity 30KW? I'm the first owner of my Car imported directly from Japan If anyone knows, how to fix this issue. Please let us Know. Regards, Anil